When is a lunch more than just a midday meal? When the two diners are President Barack Obama and Hillary Rodham Clinton, and inquiring minds want to know who, if anyone, the president will endorse in 2016.

A summertime meal shared by Obama and his rival-turned-ally threw the political speculation machine into overdrive recently, highlighting how closely both are being watched for signs of their intentions in the next presidential race.

For Clinton, it’s a question of whether the former first lady will take the plunge, launching another campaign eight years after she lost to Obama in a hard-fought primary. For Obama, it’s about dueling loyalties to two of his closest advisers who would both covet his endorsement: Clinton and Vice President Joe Biden, who is also said to be eyeing the Oval Office.

Such questions set the table for a midday powwow over salad, grilled chicken and pasta jambalaya whipped up by the White House chef and served al fresco on the patio just outside the Oval Office.

Will Clinton tip her hand? Will Obama offer his support? Or will the two dive deep into current events — bloodshed in Egypt, for instance, or a budding new round of Mideast peace talks that eluded Clinton as secretary of state?

In all likelihood, none of the above.

“The purpose of the lunch was chiefly social,” said White House spokesman Josh Earnest, calling it a “chance to catch up” and adding that Obama had initiated the invitation. “Secretary Clinton and the president have developed not just a strong working relationship, but also a genuine friendship.”

It’s not the first time the two have huddled since Clinton stepped down in February after four years as Obama’s top diplomat. They saw each other briefly in Dallas at the opening of former President George W. Bush’s presidential library in April. And in March, the Clintons shared a private dinner with Obama that wasn't announced publicly until after the fact.

In the meantime, Clinton has kept up a hectic schedule of speeches and public appearances that has provided further fodder to those urging her to run again. A super PAC seeking to create a campaign-in-waiting in case she runs, Ready for Hillary, recently picked up support from some of Obama's most prominent former campaign organizers.

So it’s no wonder that each Obama-Clinton rendezvous is closely analyzed, elating some and prompting eye rolls from others who lament that barely six months in to Obama’s second term, talk about his replacement is already reaching a fever pitch.

“In Democratic circles, it makes people fantasize and engage in all kinds of speculation, when it fact it may just be a tete-a-tete between the leader of the free world and the most important person in the Democratic Party,” said Hank Sheinkopf, a New York-based Democratic strategist who worked on President Bill Clinton's 1996 re-election.

So what are the chances that Biden pops in for coffee and desert, a casual reminder that he’s still the one with the office closest to Obama’s?